Problem with double join the same table with Active Record

[eluser]amatotax[/eluser]
Youupiee made it

Code:

$this->db
->select('users.id, rel.sender, rel.recipient')
->from('users')
->join('relations as rel', 'rel.sender = users.id OR rel.recipient = users.id')
->where(array('users.id' => $uid, 'rel.is_accepted' => 1));